document.write( "Question 333165: Solve by elimination:\r
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document.write( "-x+3y=6
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document.write( "x-9y=9 \n" );
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Algebra.Com's Answer #238751 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! -x+3y=6 \n" ); document.write( "x-9y=9 ADD. \n" ); document.write( "---------------- \n" ); document.write( "-6y=15 \n" ); document.write( "y=15/-6 \n" ); document.write( "y=-2.5 ans. \n" ); document.write( "-x+3*-2.5=6 \n" ); document.write( "x+-7.5=6 \n" ); document.write( "x=6+7.5 \n" ); document.write( "x=13.5 ans. \n" ); document.write( "Proof: \n" ); document.write( "13.5-9*-2.5=9 \n" ); document.write( "13.5+22.5=9 \n" ); document.write( "9=9 \n" ); document.write( " |